When using 1.0.0+ and using spark-shell or spark-submit, use the –executor-memory option. E.g. spark-shell –executor-memory 8G … 0.9.0 and under: When you start a job or start the shell change the memory. We had to modify the spark-shell script so that it would carry command line arguments through as arguments for the underlying java application. … Read more
The approved answer is correct but, to be more precise, error slurmstepd: error: Detected 1 oom-kill event(s) in step 1090990.batch cgroup. indicates that you are low on Linux’s CPU RAM memory. If you were, for instance, running some computation on GPU, requesting more GPU memory than what is available will result in an error like … Read more
In spite of the historical interchanging of these two terms, they indicate different things. They are both methods for managing moving data in memory to another storage device, called a backing store (often a hard drive), but they use different methods of doing so. Swapping involves the moving of a process’s entire collection data in … Read more
Yes, leaking memory in Rust is as easy as calling the std::mem::forget function. You can also leak memory if you create a cycle of shared references: A cycle between Rc pointers will never be deallocated. For this reason, Weak is used to break cycles. For example, a tree could have strong Rc pointers from parent … Read more
The thing is, ECC is dirt cheap compared to “software ECC countermeasures”. You can easily detect if they have ECC modules and complain (or print a warning) when they don’t. http://www.cyberciti.biz/faq/ecc-memory-modules/ For example, can we see all writes to memory (both from user and kernel space), to distinguish between intended memory changes from in-memory bit … Read more
Surely apocrapful, but here’s Einstein’s number: A reporter interviewed Albert Einstein. At the end of the interview, the reporter asked if he could have Einstein’s phone number so he could call if he had further questions. “Certainly” replied Einstein. He picked up the phone directory and looked up his phone number, then wrote it on … Read more
There are many reasons to do this: If you have a compiled binary, each function has a fixed address in memory and the assembly instructions to call functions have that address hardcoded. If virtual memory didn’t exist, two programs couldn’t be loaded into memory and run at the same time, because they’d potentially need to … Read more
It is a very common mistake to forget that the activations, gradients and optimizer moment tracking variables also take VRRAM, not just the parameters, increasing memory usage quite a bit. The backprob calculations themselves make it so the training phase takes almost double the VRAM of forward / inference use of the neural net, and … Read more
From this post: This exception occurred for one simple reason : the permgenspace is where class properties, such as methods, fields, annotations, and also static variables, etc. are stored in the Java VM, but this space has the particularity to not being cleaned by the garbage collector. So if your webapp uses or creates a … Read more